Check if a inputted variable is a number or a string, given a string input (i.e. '1' is 1 and thus a number, 'a' is a string).
Additional test cases have been added.
Reverse the vector
04 - Scalar Equations 1
Area of a Square
Sum of series III
String Delimination and Outputting
Vector indexing: lower than mean
Matrix element wise multiplication
Sum two matrices
Simple String Concatenation
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